959
FNCA52 TJSJ 010827
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
427 AM AST SUN FEB 1 2026
DISCUSSION
AN APPROACHING FRONTAL BOUNDARY FROM THE ATLANTIC WATERS AND MONA
PASSAGE, WILL GRADUALLY INCREASE CLOUDINESS AND SHOWER ACTIVITY
OVER PUERTO RICO TODAY. MODERATE SOUTHERLY WINDS WITH GUSTS
BETWEEN 20 AND 25 MPH ARE EXPECTED ONCE AGAIN, WITH SOUTHWESTERLY
COMPONENT EXPECTED THIS AFTERNOON. ALTHOUGH FUEL MOISTURE CONTENT
AND THE RELATIVE HUMIDITY ARE NOT EXPECTED TO DROP TO CRITICAL
LEVELS, THE STRONGER THAN NORMAL WINDS COULD AID IN THE SPREAD OF
ANY WILDFIRES.
PRZ014-020830-
SOUTHEAST COASTAL PLAINS-
427 AM AST SUN FEB 1 2026
TODAY TONIGHT MON
CLOUD COVER MCLDY MCLDY CLOUDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 80 80 90
TEMP (24H TREND) 86 (+2) 70 (-3) 84
RH % (24H TREND) 59 (-14) 96 (+3) 61
WIND 20FT/EARLY(MPH) SE 12 SE 5 NE 6
WIND 20FT/LATE(MPH) SE 12 SE 5 NE 6
MIXING HGT(FT-AGL/MSL)3830 1750
TRANSPORT WND (MPH) SE 12 N 2
VENT RATE (KT-FT) 38300 3500
DISPERSION 5 3
DSI 6 1 4
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-020830-
SOUTHERN HILLS-
427 AM AST SUN FEB 1 2026
TODAY TONIGHT MON
CLOUD COVER MCLDY MCLDY CLOUDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 80 80 90
TEMP (24H TREND) 82 (+3) 67 (-4) 79
RH % (24H TREND) 73 (-7) 100 (+4) 77
WIND 20FT/EARLY(MPH) SE 13 SE 8 N 13
WIND 20FT/LATE(MPH) SE 13 SE 8 N 13
MIXING HGT(FT-AGL/MSL)4600 1410
TRANSPORT WND (MPH) S 14 N 6
VENT RATE (KT-FT) 55200 7050
DISPERSION 5 5
DSI 6 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-020830-
NORTH COASTAL PLAINS-
427 AM AST SUN FEB 1 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 70 60 70
TEMP (24H TREND) 88 (+2) 69 (-3) 81
RH % (24H TREND) 63 (-5) 100 (+4) 76
WIND 20FT/EARLY(MPH) S 14 S 10 N 19 G24
WIND 20FT/LATE(MPH) S 14 S 10 N 19 G24
MIXING HGT(FT-AGL/MSL)5130 1980
TRANSPORT WND (MPH) S 10 N 18
VENT RATE (KT-FT) 46170 31680
DISPERSION 5 5
DSI 5 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-020830-
NORTHERN HILLS-
427 AM AST SUN FEB 1 2026
TODAY TONIGHT MON
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 70 60 70
TEMP (24H TREND) 87 (+3) 68 (-3) 79
RH % (24H TREND) 63 (-4) 100 (+4) 79
WIND 20FT/EARLY(MPH) S 12 S 9 N 18 G22
WIND 20FT/LATE(MPH) S 12 S 9 N 18 G22
MIXING HGT(FT-AGL/MSL)5050 1530
TRANSPORT WND (MPH) S 10 N 17
VENT RATE (KT-FT) 45450 22950
DISPERSION 5 5
DSI 6 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-020830-
WEST COAST-
427 AM AST SUN FEB 1 2026
TODAY TONIGHT MON
CLOUD COVER MCLDY CLOUDY CLOUDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 80 90 80
TEMP (24H TREND) 88 (+2) 70 (-2) 82
RH % (24H TREND) 66 (-5) 100 (+3) 74
WIND 20FT/EARLY(MPH) SE 16 G18 SE 12 N 21 G25
WIND 20FT/LATE(MPH) SE 16 G18 SE 12 N 21 G25
MIXING HGT(FT-AGL/MSL)4260 2500
TRANSPORT WND (MPH) SE 18 N 24
VENT RATE (KT-FT) 68160 52500
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-020830-
EASTERN INTERIOR-
427 AM AST SUN FEB 1 2026
TODAY TONIGHT MON
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 80 80 80
TEMP (24H TREND) 85 (+4) 69 (-3) 81
RH % (24H TREND) 68 (-9) 100 (+3) 78
WIND 20FT/EARLY(MPH) S 12 S 11 N 18
WIND 20FT/LATE(MPH) S 12 S 11 N 18
MIXING HGT(FT-AGL/MSL)5050 1490
TRANSPORT WND (MPH) S 15 NW 7
VENT RATE (KT-FT) 65650 8940
DISPERSION 5 4
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-020830-
LUQUILLO MOUNTAIN RANGE-
427 AM AST SUN FEB 1 2026
TODAY TONIGHT MON
CLOUD COVER MCLDY MCLDY CLOUDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 80 80 80
TEMP (24H TREND) 80 (+4) 66 (-4) 77
RH % (24H TREND) 76 (-7) 100 (0) 78
WIND 20FT/EARLY(MPH) S 10 S 8 N 13 G17
WIND 20FT/LATE(MPH) S 10 S 8 N 13 G17
MIXING HGT(FT-AGL/MSL)3990 1210
TRANSPORT WND (MPH) S 15 N 8
VENT RATE (KT-FT) 51870 8470
DISPERSION 5 3
DSI 6 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-020830-
CENTRAL MOUNTAIN RANGE-
427 AM AST SUN FEB 1 2026
TODAY TONIGHT MON
CLOUD COVER MCLDY MCLDY CLOUDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 70 80 80
TEMP (24H TREND) 83 (+4) 65 (-5) 78
RH % (24H TREND) 68 (-8) 100 (+3) 75
WIND 20FT/EARLY(MPH) S 14 S 11 N 18
WIND 20FT/LATE(MPH) S 14 S 11 N 18
MIXING HGT(FT-AGL/MSL)5220 1270
TRANSPORT WND (MPH) S 13 N 13
VENT RATE (KT-FT) 57420 13970
DISPERSION 5 5
DSI 6 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-020830-
CAYEY MOUNTAIN RANGE-
427 AM AST SUN FEB 1 2026
TODAY TONIGHT MON
CLOUD COVER MCLDY MCLDY CLOUDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 80 80 80
TEMP (24H TREND) 79 (+3) 67 (-3) 77
RH % (24H TREND) 79 (-6) 100 (+1) 81
WIND 20FT/EARLY(MPH) S 10 S 5 N 6
WIND 20FT/LATE(MPH) S 10 S 5 N 6
MIXING HGT(FT-AGL/MSL)4130 1350
TRANSPORT WND (MPH) S 15 N 5
VENT RATE (KT-FT) 53690 5400
DISPERSION 5 3
DSI 6 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-020830-
VIEQUES-
427 AM AST SUN FEB 1 2026
TODAY TONIGHT MON
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 70 80 70
TEMP (24H TREND) 85 (0) 71 (-3) 85
RH % (24H TREND) 63 (-3) 100 (+4) 63
WIND 20FT/EARLY(MPH) SE 13 G17 SE 12 W 16 G20
WIND 20FT/LATE(MPH) SE 13 G17 SE 12 W 16 G20
MIXING HGT(FT-AGL/MSL)2670 1560
TRANSPORT WND (MPH) S 16 N 16
VENT RATE (KT-FT) 37380 21840
DISPERSION 5 5
DSI 6 4 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-020830-
CULEBRA-
427 AM AST SUN FEB 1 2026
TODAY TONIGHT MON
CLOUD COVER MCLDY MCLDY CLOUDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 60 80 80
TEMP (24H TREND) 86 (+1) 73 (-3) 85
RH % (24H TREND) 65 (-3) 100 (+6) 66
WIND 20FT/EARLY(MPH) S 14 G18 S 13 W 19 G24
WIND 20FT/LATE(MPH) S 14 G18 S 13 W 19 G24
MIXING HGT(FT-AGL/MSL)2670 1840
TRANSPORT WND (MPH) S 20 N 22
VENT RATE (KT-FT) 45390 34960
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-020830-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
427 AM AST SUN FEB 1 2026
TODAY TONIGHT MON
CLOUD COVER CLOUDY CLOUDY CLOUDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 80 90 90
TEMP (24H TREND) 87 (+2) 70 (-4) 85
RH % (24H TREND) 58 (-12) 98 (+5) 60
WIND 20FT/EARLY(MPH) SE 17 G22 SE 11 N 24 G30
WIND 20FT/LATE(MPH) SE 17 G22 SE 11 N 24 G30
MIXING HGT(FT-AGL/MSL)4090 2560
TRANSPORT WND (MPH) SE 17 N 18
VENT RATE (KT-FT) 61350 40960
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-020830-
SAINT THOMAS AND SAINT JOHN-
427 AM AST SUN FEB 1 2026
TODAY TONIGHT MON
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 60 70 70
TEMP (24H TREND) 85 (+1) 73 (-3) 85
RH % (24H TREND) 64 (-4) 99 (+5) 62
WIND 20FT/EARLY(MPH) SE 14 G18 SE 12 SW 14 G19
WIND 20FT/LATE(MPH) SE 14 G18 SE 12 SW 14 G19
MIXING HGT(FT-AGL/MSL)2640 1840
TRANSPORT WND (MPH) SE 18 SW 8
VENT RATE (KT-FT) 42240 12880
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-020830-
ST CROIX-
427 AM AST SUN FEB 1 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 50 50 50
TEMP (24H TREND) 86 (+1) 72 (-4) 86
RH % (24H TREND) 64 (-5) 97 (+5) 62
WIND 20FT/EARLY(MPH) SE 13 G17 SE 12 S 8
WIND 20FT/LATE(MPH) SE 13 G17 SE 12 S 8
MIXING HGT(FT-AGL/MSL)3910 3290
TRANSPORT WND (MPH) SE 17 S 6
VENT RATE (KT-FT) 58650 16450
DISPERSION 5 4
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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